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Patch: put back missing doloop optimization

From: Dale Johannesen <dalej at apple dot com>
To: GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Tue, 30 Aug 2005 18:44:46 -0700
Subject: Patch: put back missing doloop optimization

As discussed on gcc@.  This is a performance regression from
gcc-3.3.  Bootstrapped/regtested ppc Darwin.  OK?  (Sebastian
should probably sign off on this, since he had an objection on
gcc@).

2005-08-30 Dale Johannesen <dalej@apple.com>

        * loop-iv.c (iv_number_of_iterations):  Fix overflow check for
        loops that count down.

2005-08-30 Dale Johannesen <dalej@apple.com>

* gcc.dg/20050830-1.c: New.

Attachment: diffs5.txt
Description: Text document

Attachment: 20050830-1.c
Description: Text document

Follow-Ups:
- Re: Patch: put back missing doloop optimization
  - From: Sebastian Pop
- Re: Patch: put back missing doloop optimization
  - From: Richard Henderson

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